circular import error

[iplayfast]

I've just cloned and installed coin, I then cloned and installed pivy.
trying to import pivy gives.

python
Python 3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

import pivy
Traceback (most recent call last):
File "", line 1, in
File "/home/chris/github/pivy/build/pivy/init.py", line 30, in
from .coin import SoDB, SoNodeKit, SoInteraction
File "/home/chris/github/pivy/build/pivy/coin.py", line 21, in
from . import _coin
ImportError: cannot import name '_coin' from partially initialized module 'pivy' (most likely due to a circular import) (/home/chris/github/pivy/build/pivy/init.py)

[looooo]

maybe you can try to run python from the home-directory. If you have installed pivy python should use the installed version.

[iplayfast]

To be clear. I cloned and installed coin, (cd build;cmake ..;make;sudo make install). Then cloned and installed pivy (cd build;cmake ..;make;sudo make install). So should be a clean fresh install.

Going to a new terminal (directory is ~) I typed
python
import pivy

and got the error.

Did you try and find a different result?

[mconsidine]

I am having the same problem. Downloaded and installed coin, soqt and quarter from sources per instructions in INSTALL and did not have any errors. Using the compile/install instructions for pivy I see the same problem
`
~/Downloads/Coin3D/pivy/build$ cmake ..
-- COIN_FOUND: TRUE
-- COIN_INCLUDE_DIR: /usr/local/include
-- COIN_LIB_DIR: /usr/local/lib
-- COIN_VERSION: 4.0.1
CMake Warning at /usr/share/cmake-3.22/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
By not providing "FindQt5Core.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Qt5Core", but
CMake did not find one.

Could not find a package configuration file provided by "Qt5Core" with any
of the following names:

Qt5CoreConfig.cmake
qt5core-config.cmake

Add the installation prefix of "Qt5Core" to CMAKE_PREFIX_PATH or set
"Qt5Core_DIR" to a directory containing one of the above files. If
"Qt5Core" provides a separate development package or SDK, be sure it has
been installed.
Call Stack (most recent call first):
/usr/local/lib/cmake/SoQt-1.6.0/soqt-config.cmake:65 (find_dependency)
CMakeLists.txt:15 (find_package)

CMake Warning at CMakeLists.txt:15 (find_package):
Found package configuration file:

/usr/local/lib/cmake/SoQt-1.6.0/soqt-config.cmake

but it set SoQt_FOUND to FALSE so package "SoQt" is considered to be NOT
FOUND. Reason given by package:

SoQt could not be found because dependency Qt5Core could not be found.

-- Configuring done
-- Generating done
-- Build files have been written to: ~/Downloads/Coin3D/pivy
Then:Python 3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

import pivy
Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python3/dist-packages/pivy/init.py", line 30, in
from .coin import SoDB, SoNodeKit, SoInteraction
File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40333, in
class SoGeo(object):
File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40367, in SoGeo
swig_destroy = _coin.delete_SoGeo
AttributeError: module 'pivy._coin' has no attribute 'delete_SoGeo'

`

[foobarbecue]

This happened to me when I tried import pivy while the the current working directory was the build directory. I went up a couple of directories to the one above where I cloned pivy, and then it imported fine..

[foobarbecue]

But then, from pivy import coin failed. Actually, I can't find enough documentation to use this at all.

[foobarbecue]

Aha, I had to run sudo make install. That's missing from the README.

[foobarbecue]

So I tried to run examples/examiner_embed.py and I get ModuleNotFoundError: No module named 'pivy.gui.soqt'

[looooo]

@foobarbecue if soqt is not found pivy is build without soqt-support. Maybe this is the case here

[foobarbecue]

Could someone make a quick dockerfile that shows how to install and run this to the point that any of the examples work? Otherwise, it's just too much guesswork.

[looooo]

using conda is no option for you?

conda create -n pivy coin3d soqt cmake swig -c conda-forge
conda activate pivy
git clone https://github.com/coin3d/pivy.git
cd pivy
mkdir build
cd build
cmake ..
make install
... run examples

or installing pivy directly with conda:

conda create -n pivy pivy -c conda-forge
conda activate pivy
... run examples

[foobarbecue]

@looooo great to hear it's on conda -- I had no idea! I installed pivy through conda. Now, how do I "... run examples" exactly?

[foobarbecue]

Ok, I installed pivy through conda, activated that conda environment, cloned this repo and then tried running the python files in pivy/examples/Mentor/ . I got a GUI window! However, it's always blank:

[foobarbecue]

(pivy) aacurtis@MT-405357:~/pivy/examples/Quarter$ ./minimal.py
Traceback (most recent call last):
  File "/home/aacurtis/pivy/examples/Quarter/./minimal.py", line 21, in <module>
    from pivy.qt.QtWidgets import QApplication
ModuleNotFoundError: No module named 'pivy.qt'

[foobarbecue]

Ok I tried the stuff in pivy/examples/Mentor/ after installing pivy using conda on a Debian 12 system. The above is Ubuntu on WSL2 on Windows. Normally that works fine for graphical linux things.

Anyway, I could try making a debian 12 dockerfile and see if it works on WSL and then maybe that would be worth including in this repo.

[looooo]

(pivy) aacurtis@MT-405357:~/pivy/examples/Quarter$ ./minimal.py
Traceback (most recent call last):
  File "/home/aacurtis/pivy/examples/Quarter/./minimal.py", line 21, in <module>
    from pivy.qt.QtWidgets import QApplication
ModuleNotFoundError: No module named 'pivy.qt'

The repo was updated to work with pyside6 and pyside2. But the conda build is older and doesn't take this change into account.

[olumide-x]

I too am having a lot of difficulty building pivy. I have already built and installed coin, soqt, quarter and soxt without issues. The CMake options fails because of what appears to the a QT bug

 COIN_FOUND: TRUE
 COIN_INCLUDE_DIR: /usr/local/include
 COIN_LIB_DIR: /usr/local/lib
 COIN_VERSION: 4.0.2
 CMake Error at /opt/cmake-3.19.1-Linux-x86_64/share/cmake-3.19/Modules/FindThreads.cmake:62 (message):
   FindThreads only works if either C or CXX language is enabled
 Call Stack (most recent call first):
   /opt/cmake-3.19.1-Linux-x86_64/share/cmake-3.19/Modules/CMakeFindDependencyMacro.cmake:47 (find_package)
   /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:36 (find_dependency)
   /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6/Qt6Dependencies.cmake:24 (_qt_internal_find_third_party_dependencies)
   /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6/Qt6Config.cmake:111 (include)
   /opt/cmake-3.19.1-Linux-x86_64/share/cmake-3.19/Modules/CMakeFindDependencyMacro.cmake:47 (find_package)
   /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6Core/Qt6CoreDependencies.cmake:17 (find_dependency)
   /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6Core/Qt6CoreConfig.cmake:41 (include)
   /opt/cmake-3.19.1-Linux-x86_64/share/cmake-3.19/Modules/CMakeFindDependencyMacro.cmake:47 (find_package)
   /usr/local/lib/cmake/SoQt-1.6.1/soqt-config.cmake:60 (find_dependency)
   CMakeLists.txt:15 (find_package)

 CMake Warning at /opt/cmake-3.19.1-Linux-x86_64/share/cmake-3.19/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
   Found package configuration file:

     /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6/Qt6Config.cmake

   but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT
   FOUND.
 Call Stack (most recent call first):
   /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6Core/Qt6CoreDependencies.cmake:17 (find_dependency)
   /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6Core/Qt6CoreConfig.cmake:41 (include)
   /opt/cmake-3.19.1-Linux-x86_64/share/cmake-3.19/Modules/CMakeFindDependencyMacro.cmake:47 (find_package)
   /usr/local/lib/cmake/SoQt-1.6.1/soqt-config.cmake:60 (find_dependency)
   CMakeLists.txt:15 (find_package)

 CMake Warning at /opt/cmake-3.19.1-Linux-x86_64/share/cmake-3.19/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
   Found package configuration file:

     /home/olumide/Qt6/6.6.1/gcc_64/lib/cmake/Qt6Core/Qt6CoreConfig.cmake

   but it set Qt6Core_FOUND to FALSE so package "Qt6Core" is considered to be
   NOT FOUND.
 Call Stack (most recent call first):
   /usr/local/lib/cmake/SoQt-1.6.1/soqt-config.cmake:60 (find_dependency)
   CMakeLists.txt:15 (find_package)

 Configuring incomplete, errors occurred!
 See also "/home/olumide/Downloads/src/pivy/CMakeFiles/CMakeOutput.log".

The setup.py option appeared to compile successfully but after a lengthy warning

CMake Warning at /opt/cmake-3.19.1-Linux-x86_64/share/cmake-3.19/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
  By not providing "FindQt6Core.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Qt6Core", but
  CMake did not find one.

  Could not find a package configuration file provided by "Qt6Core" with any
  of the following names:

    Qt6CoreConfig.cmake
    qt6core-config.cmake

  Add the installation prefix of "Qt6Core" to CMAKE_PREFIX_PATH or set
  "Qt6Core_DIR" to a directory containing one of the above files.  If
  "Qt6Core" provides a separate development package or SDK, be sure it has
  been installed.
Call Stack (most recent call first):
  /usr/local/lib/cmake/SoQt-1.6.1/soqt-config.cmake:60 (find_dependency)
  CMakeLists.txt:15 (find_package)


CMake Warning at CMakeLists.txt:15 (find_package):
  Found package configuration file:

    /usr/local/lib/cmake/SoQt-1.6.1/soqt-config.cmake

  but it set SoQt_FOUND to FALSE so package "SoQt" is considered to be NOT
  FOUND.  Reason given by package:

  SoQt could not be found because dependency Qt6Core could not be found

Unfortunately the build appears to incomplete, as shown below:

>>> from pivy.qt import QtWidgets
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'pivy.qt'